Why doesn't Shunyata make a subwoofer cable?

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Why doesn't Shunyata make a subwoofer cable?
I'm not judging them, I just want to know. Some of the other brands have a deeper product line and since Shunyata is highly regarded I'm wondering why they don't offer it? Also some of their cables aren't across the entire hierarchy. Sigma/Alpha/Delta have their own signature look, and then the Venom have the look of a lower priced economy cable (when comparing them against their higher priced siblings).

And if there isn't any difference why does Nordost and Audioquest bother with them at all?

I have another thread about the difference in the Cables Galore topic : https://www.audioaficionado.org/showthread.php?t=41056